From patchwork Thu May 9 14:38:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joe Lawrence X-Patchwork-Id: 10937255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F14C41390 for ; Thu, 9 May 2019 14:39:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E05ED1FF30 for ; Thu, 9 May 2019 14:39:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D37F228A19; Thu, 9 May 2019 14:39:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 83E1B1FF30 for ; Thu, 9 May 2019 14:39:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726990AbfEIOjr (ORCPT ); Thu, 9 May 2019 10:39:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43526 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726743AbfEIOjL (ORCPT ); Thu, 9 May 2019 10:39:11 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 78F363079B93; Thu, 9 May 2019 14:39:11 +0000 (UTC) Received: from jlaw-desktop.redhat.com (ovpn-123-90.rdu2.redhat.com [10.10.123.90]) by smtp.corp.redhat.com (Postfix) with ESMTP id E38925DF49; Thu, 9 May 2019 14:39:10 +0000 (UTC) From: Joe Lawrence To: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: [PATCH v4 04/10] livepatch: Add klp-convert annotation helpers Date: Thu, 9 May 2019 10:38:53 -0400 Message-Id: <20190509143859.9050-5-joe.lawrence@redhat.com> In-Reply-To: <20190509143859.9050-1-joe.lawrence@redhat.com> References: <20190509143859.9050-1-joe.lawrence@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Thu, 09 May 2019 14:39:11 +0000 (UTC) Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Josh Poimboeuf Define macros KLP_MODULE_RELOC and KLP_SYMPOS in include/linux/livepatch.h to improve user-friendliness of the livepatch annotation process. Signed-off-by: Josh Poimboeuf Signed-off-by: Joao Moreira Signed-off-by: Joe Lawrence --- include/linux/livepatch.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h index 16b48e8b29a2..3071aec8fd72 100644 --- a/include/linux/livepatch.h +++ b/include/linux/livepatch.h @@ -236,6 +236,18 @@ void *klp_shadow_get_or_alloc(void *obj, unsigned long id, void klp_shadow_free(void *obj, unsigned long id, klp_shadow_dtor_t dtor); void klp_shadow_free_all(unsigned long id, klp_shadow_dtor_t dtor); +/* Used to annotate symbol relocations in livepatches */ +#define KLP_MODULE_RELOC(obj) \ + struct klp_module_reloc \ + __attribute__((__section__(".klp.module_relocs." #obj))) \ + __attribute__((aligned (4))) + +#define KLP_SYMPOS(symbol, pos) \ + { \ + .sym = &symbol, \ + .sympos = pos, \ + } + #else /* !CONFIG_LIVEPATCH */ static inline int klp_module_coming(struct module *mod) { return 0; }